Attachment_J-3_Specifications.pdf

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SUMMARY OF WORK

SECTION 01110

1 .1 DESCRIPTION

A. The work of this contract consists of reroofing Madison District Ranger Station Office. This work shall include removing the existing asphalt shingles and roofing felt, all flashing, and rain gutter over the rear doorway; and installing new metal drip edge, new penetration flashing, new rain gutter over the rear doorway, new chimney flashing, and a new asphalt shingle roof system.

B. All work will be performed under a single contract.

1 .2 LOCATION

A. The Madison District Ranger Station Office is located at 5 Forest Service Road, Ennis, Montana.

1 .3 CONTRACTOR'S USE OF PREMISES

A. Construction Camp: Establishment of a camp at the construction site will not be permitted.

B. Conduct operations to ensure the least inconvenience to the building occupants and the public at all times.

C. Confine storage of materials to areas designated at the pre-construction conference.

1 .4 SPECIAL CONSTRUCTION REQUIREMENTS

A. Weekend and Holiday Work Restrictions: No on-site work shall be performed on weekends or federal holidays unless otherwise authorized by the Contracting Officer.

1 .5 FIELD VERIFICATION

A. Contractor is responsible for verifying all new and existing dimensions affecting the work of this contract.

1 .6 TEMPORARY SERVICES

A. Electrical service, in the form of 120 volt, 15 amp receptacles on or in the building, is available at no cost to the Contractor.

B. No telephone service is available on site for Contractor’s use.

C. Potable water and sanitary facilities are available at the Madison Ranger Station office during normal business hours.

1 .7 TEMPORARY CONTROLS

A. SAFETY:

1. All work shall be performed in accordance with applicable OSHA regulations.

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2. Conduct operations to ensure the safety of building occupants, the public, and contractor’s personnel. Provide barriers as needed to prevent building occupants and the public from entering areas below immediate work areas.

B. HOUSEKEEPING:

1. Keep project neat, orderly, and in a safe condition at all times. All construction debris and demolished material shall be cleaned up at the end of each working day and placed in suitable containers.

2. Provide containers for collecting construction debris and demolished material. Forest Service trash receptacles shall not be used.

C. DISPOSAL:

1. Dispose of construction debris and demolished material in a legal manner off of Forest Service property

1 .8 CONSTRUCTION MATERIALS

A. All materials shall be Contractor-furnished.

1 .9 PRECONSTRUCTION CONFERENCE

A. Before the start of construction, the Contracting Officer will arrange pre-construction meeting with the Contractor.

4 .1 Payment will be made at the contract lump sum price.

END OF SECTION

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ASPHALT SHINGLES

SECTION 07311

1 .1 DESCRIPTION

A. The work of this section consists of reroofing existing buildings. The work shall include removing the existing roofing materials, flashing, and roofing accessories; and installing new flashing, accessories, and new asphalt shingle roof systems.

1 .2 SUBMITTALS

A. Manufacturer's specifications and installation instructions for

1. Asphalt shingles

2. Ice dam protection

B. Samples: Furnish each of the following:

1. Shingles: One strip of each type.

1 .3 PRODUCT HANDLING

A. Deliver shingles in manufacturer's original packaging, unopened, dry, undamaged, with seals and labels intact. Store products in weather protected environment, clear of ground and moisture according to manufacturer's recommendations.

1 .4 PROJECT CONDITIONS

A. Proceed with shingle installation only when existing and forecasted weather will allow work to be performed according to manufacturer’s recommendations and warranty requirements, and when deck is completely dry.

1 .5 WARRANTY

A. All materials and installation methods shall meet the manufacturer’s warranty requirements.

Before beginning work, report to Contracting Officer if any specification requirements conflict with shingle manufacturer's warranty requirements.

1. Submit manufacturer’s 40 year warranty agreeing to refund or replace, on a prorated basis that includes materials and application labor, asphalt shingles that fail in materials or manufacturing workmanship within the specified warranty period and 5 year non-prorated umbrella coverage.

PART 2 PRODUCTS

2 .1 UNDERLAYMENT

A. ASTM D226, type I or II, 15-pound or 30-pound, unperforated.

2 .2 ICE DAM PROTECTION

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A. Elastomeric Underlayment: Rubberized asphaltic sheet laminated to a polypropylene film meeting the requirements of ASTM D 1970, 40 mil minimum total thickness, 36 inch width, manufacturer approved by shingle manufacturer.

2 .3 SHINGLES

A. Fiberglass base, mineral granule-surfaced type, two-ply laminated, meeting ASTM D3018, UL Class A with type I self-sealing. Shingles shall be Timberline HD manufactured by GAF Corporation or approved equal. Color shall be “Weathered Wood”.

B. Hip and Ridge Shingles: As recommended by shingle manufacturer.

C. Eave/Rake Starter Strip: Starter strip manufactured for the purpose, as recommended by shingle manufacturer.

2 .4 FASTENERS FOR SHINGLES

A. Roofing nails, zinc coated, 10 to 12 gauge, barbed, deformed, or smooth shank roofing nails with heads 3/8” to 7/16” in diameter. Fasteners shall be long enough to penetrate wood decks at least ¾-inch or just through plywood decking.

2 .5 RIDGE VENT

A. UV-stabilized plastic designed to be installed under asphalt shingles as recommended by shingle manufacturer.

2 .6 GUTTERS AND DOWNSPOUTS

A. K-style, aluminum with factory applied 20 year fluoropolymer finish, color: white.

2 .7 FLASHING

A. Metal Drip Edge: 28-gauge aluminum, minimum 3/8-inch overhang, with factory applied 20 year fluoropolymer finish, color: white.

B. Penetration Flashing: Galvanized steel with tight fitting rubber seal, manufactured for size of penetration.

C. Chimney Flashing: Galvanized steel, 24 gauge, sized for existing chimney, 4-inch minimum flange or horizontal leg.

D. Valley Flashing: Galvanized steel, 24 gauge, 20-inch minimum width.

E. Step Flashing: Galvanized steel, 24 gauge, minimum 5-inch vertical leg, and 5-inch horizontal leg.

2 .8 ASPHALT PLASTIC CEMENT

A. Asphalt plastic cement conforming to ASTMD4586 Type I or II.

PART 3 EXECUTION

3 .1 DEMOLITION

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A. Remove all components of the existing roofing system, including fasteners and flashing, down to the existing decking.

3 .2 INSPECTION

A. Surface to which the roofing is to be applied shall be even, smooth, sound, clean, and dry. Notify Contracting Officer immediately if deficiencies in roof decking are found. Do not begin roofing work until surface deficiencies have been corrected.

3 .3 DRIP EDGE

A. Install tight against fascia at all eaves and rakes. Lap joints 2 inch minimum. Fasten to roof deck with nails 12 inches on center.

B. At eaves, place drip edge directly onto deck below underlayment. At rakes, place drip edge over underlayment.

3 .4 ICE DAM PROTECTION

A. Install elastomeric underlayment in accordance with manufacturer’s recommendation. Extend from the eave edge to a point at least 24 inches beyond the inside wall. Begin application of felt underlayment by overlapping the elastomeric material a minimum of 2 inches.

3 .5 FELT UNDERLAYMENT

A. Completely cover the deck with one layer of underlayment. Begin by fastening a full 36 inch wide sheet along eaves. Succeeding courses should overlap existing courses 2 inches. Lap ends 4 inches and stagger end laps 6 feet minimum. Lap the felt 6 inches from both sides over all hips and ridges. Tack felts in place.

3 .6 ROOF PENETRATION FLASHING AND EXHAUST VENT CAPS

A. Install preformed metal flashing under shingles on upslope and on top of shingles on downside.

Set in plastic cement. Fasten with nails as recommended by manufacturer. Conceal fasteners. Do not try to conceal downside of flashing.

3 .7 ASPHALT SHINGLES

A. Install roofing system in accordance with manufactures instructions for high slope applications and using 6 nail per shingle enhanced nailing pattern as recommended for high wind areas.

B. Install starter strips at the eaves and rake edges. Fasten according to manufacturer’s recommendations.

C. Place shingles in straight coursing pattern with 5-5/8 inch weather exposure. Fasten shingle with 6 nails per shingle. Construct hips and ridges as recommended by manufacturer.

D. Project first course of shingles minimum ½ inch to maximum ¾ inch beyond face of eave fascia.

Extend shingles minimum ½ inch to maximum ¾ inch beyond face of rake edge fascia.

E. Construct valleys as “Open Valley” according to shingle manufacturer’s instructions.

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1. Center full width roll of ice dam protection in valley. Horizontal laps must be a minimum of 6-inches. Lap underlayment a minimum of 6-inches over ice dam protection.

2. Center valley flashing in valley. Fasten flashing to roof deck using clips or nail the metal on the edges so the nail heads hold it in place. Do not nail through the metal. Overlap horizontal laps a minimum of 12-inches and seal them with asphalt plastic cement.

3. Open valley shall be 6-inches wide at top of valley. Increase width of valley 1/8-inch per foot towards eave.

4. Clip the top corners of the shingles at the edge of the valley at 45 degrees to keep water flow towards the valley center.

5. Seal shingles to metal valley flashing and underlying shingle by embedding the shingle ends in asphalt plastic cement.

3 .8 GUTTERS AND DOWNSPOUTS

A. Install according to manufacturer’s installation instructions.

PART 4 MEASUREMENT AND PAYMENT

4 .1 ASPHALT SHINGLES

A. Payment will be made at the contract lump sum price.

END OF SECTION